1/2x28 Muzzle Devices
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1/2x28 is the standard muzzle thread for 5.56 and .223 AR-15 barrels, and for most .224 Valkyrie, .22 LR and 9mm AR barrels. These flash hiders, compensators, muzzle brakes and suppressor mounts all thread 1/2x28. Check the bore as well as the thread: devices made for .22-caliber bullets must never go on a .30-caliber barrel such as 300 Blackout, even with an adapter. Most come with a crush washer or shims to time the ports.
Compare 1/2x28 muzzle devices from every store we track, and see our thread size chart if you're not sure what your barrel uses.




























